The processes of generation of coefficients for weighting filter to filter noise combined weighting spectral synthesis for combined filter spectrally weighted noise to filter.Spectral noise weighting, and the process of voice coding

摘要

An Rth-order filter models the frequency response of multiple filters, to provide a filter which offers the control of multiple filters without the complexity of multiple filters. The Rth-order filter can be used as a spectral noise weighting filter or a combination of a short- term predictor filter and a spectral noise weighting filter, referred to as the spectrally noise weighted synthesis filter, depending on which embodiment is employed. In general, the method models the frequency response of L Pth-order filters by a single Rth-order filter, where the order R LP. Thus, this method increases the control of a speech coder filter without a corresponding increase in the complexity of the speech coder.